M66T Melody Generator

This is the very simple way to play a song with single 1.5 battery. You can build this circuit for gift acceccories. When the gift opened, then a song will be played.. It’s easy and cheap right..? 😀 . It just use a single small chip which will generate a song which already planted inside the chip.

Melody Generator Circuit Diagram:

Components List:
C = 1uF
R = 4.7KW
Q = 2SC9013About IC M66T series:

The M66T series is a CMOS LSI designed melody generator IC for use in telephones and toys application. It has an on-chip ROM programmed for musical performance. Produced by CMOS technology, the device results in very low power consumption. And with built-in RC oscillator, a compact melody module can be constructed with only a few additional components.

M66T Pin Assignment:

Pin 1 (O/P) Melody Output

Pin 2 (Vdd) Positive Power Supply

Pin 3 (Vss) Negative Power Supply

The following are the M66T series and the song generated by its series:

M66T-01L : Jingle Bells + Santa Claus Is Coming To Town + We Wish You A Merry Christmas